Carlisle Fairgrounds food
Since I checked chowhound before we went without finding anything, I thought I'd post for anybody else wondering.
My husband and I have been here twice in 2 years, so have gotten 4 lunches. Mostly pretty ordinary food, but the one standout was a burger I got at D&L catering, about midway in the row. Nice juicy grilled burger, on one of those not a roll, not a bun things, topped with fresh crispy romaine and decent tomato. Took a bit of time, but worth the wait!